First, heat the pressure cooker by pressing Sauté -> click on the Adjust button -> select More to get the Sauté More function.
This means the food will be sautéed on medium-high heat. Mine goes up to 395 degrees F. Wait for the Pressure Cooker indicator to read HOT, or wait about 2-3 minutes to get hot.
Meanwhile, pat dry the pork chunks with paper towel and season with salt and pepper. Add the oil to the hot pressure cooker, wait one minute for the oil to heat up and add the pork. Sauté for 3-4 minutes, stirring a few times, and cook until browned.
Stir in honey, rice vinegar, soy sauce, and tomato paste just until combined. Then, add garlic, onion, bell pepper, and pineapple chunks. Gently stir, close the lid, and seal the pressure valve.
Select either the Stew or Poultry Function and adjust time to 5 minutes. Although Pork is not poultry, the meat takes about the same time to cook. Use a 10 minute Natural Release. Turn off the heat and release remaining pressure. Open the lid and gently stir so as not to crush the pork and vegetables.
In a small bowl, make a slurry by whisking cornstarch with water until combined with no lumps. Select again the Sauté function. Add the slurry to the pork and vegetables and gently stir to combine.
Cook on Sauté function for 4-5 additional minutes, stirring occasionally, until the sauce thickens. It will get thicker as it cools.
Turn off the Pressure Cooker, add chopped green onion and sesame seeds. Serve warm over rice or riced cauliflower and enjoy!